Spindle stop motion



Dec. 12, 1939. w, R GORDON 2,183,239

SPINDLE STOP MOTION Filed Dec. 27, 1958 nnmn INVEN TOR. 1?. Gordon W BY W ATTORNEY Patented Dec. 12, 1939 UNITED STATES PATENT OFFICE SPINDLE STOP MOTION Application December 27, 1938, Serial No. 247,764

Claims.

This invention relates to textile machines such as doubling and twisting machines and particularly to actuating means for a stop motion mechamsm.

5 An object of the invention is to provide a simple and rugged operating mechanism for rapidly oscillating a pair of stop motion shafts on opposite sides of a machine on which are mounted the knock-off levers which, in the event of a thread breaking or running out, will stop operation of the spindle for that thread.

Another object of the invention is to provide means to rotate an eccentric which will actuate a connecting rod one end of which fits over the eccentric, the opposite end of the connecting rod being attached to a system of toggle levers to which a rocker shaft lever is attached.

And finally it is an object of the invention to mount the operating eccentric for the connecting rod upon an eccentric bearing for its shaft so that by rotating this bearing a portion of a revolution the connecting rod and its eccentric will be moved to a position to disengage their driving member.

With the above and other objects in view, the invention may include the features of construction and operation set forth in the following specification and illustrated in the accompanying drawing.

In the accompanying drawing annexed hereto and forming a part of this specification, I have shown the invention embodiedin a standard doubling and twisting machine but it will be understood that'the invention can be otherwise em- 35 bodied and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

In the drawing:

Fig. 1 is a fragmentary end elevation of a doubling and twisting machine showing the present invention applied thereto;

Fig. 2 is a plan view of some of the parts shown in Fig. 1;

Fig. 3 is a view of the mechanism forming the present invention taken from the left hand side of Fig. l;

Fig. 4 is a detail view of some of the operative parts of the mechanism, and t I Fig. 5 is a detail sectional view of part of the mechanism to render the mechanism inoperative, the section being taken on the plane of line 55 of Fig. 3.

In the above mentioned drawing there has 5g; beenshown but one embodiment of the invention which is now deemed preferable, but it is to be understood that changes and modifications may be made within the scope of the appended claims without departing from the spirit of the inven- 6 tion.

Briefly, and in its broadest aspect, the invention may include the following principal parts: first, a rocker shaft on which are mounted stop motion actuators at spaced positions along the shaft; second, a lever or arm on said rocker shaft; third, a pair of toggle links one end of one of these links being attached to the lever and the opposite end of the other link being pivotally attached to a fixed part of the machine; fourth, a connecting rod attached at one end to the joint connecting the two links together; fifth, an eccentric to which the opposite end of said connecting rod is attached; sixth, a shaft mounting the eccentric and rotatable at constant speed; and seventh, means to move said shaft to disengage its driving connections.

In textile machines such as doubling and twisting machines it is usual to provide means to stop operation at any spindle whenever a thread breaks or runs out. For that purpose the threads pass over drop wires so that when a'thread breaks or runs out the drop wire moves to a position to interpose the end of a member in the path of an actuator most usually mounted on a constantly oscillating shaft.- This actuator and the 0. member engaged and moved thereby when a thread breaks release a latch and render the spindle inoperative by stopping its rotation. The present invention relates to the means for constantly oscillating a shaft to move the actuators ,5. thereon into and out of positions to operate the latch means. As it is desirable to stop operation at a spindle promptly when a thread breaks means are provided for oscillating the actuator shaft rapidly, smoothly and to a predetermined 40 limited position. Furthermore, additional means are provided to stop oscillation of the actuator shaft whenever it is necessary to eliminate the stop motion action as when the machine is being initially started.

Referring more in detail to the figures of the drawing there is shown at I I] and l l rocker shafts to which stop motion actuators l2 are attached. The oscillating shafts I0 and II extend longitudinally of the machine one on each side and are suitably supported by means of aligned bearings in the machine frame members not shown. These actuators I2 spaced along the shafts l0 and II are oscillated back and forth adjacent drop Wire controlled members l3 so that when a thread breaks or runs out and a drop wire l4 falls back one end of a member I3 is interposed in the path of movement of an actuator I2. The effect of this is to release a latch l5 and permit upward movement of a vertical shaft iii to stop rotation and feeding movement at one of the spindles (not shown). As the above described mechanism is usual and standard for silk and rayon doubling and twisting machines it is not thought that further description is necessary. It will be sufiicient to state that the actuators |2 are constantly oscillated with their shafts Hi and II by the improved means forming :the'ipresenti" invention and that they are rendered inoperative by manually shifting a member of their operating means presently to be more fully described.

To oscillate the actuators |2 there is provided a driving shaft l6 havingra sprocket wheel thereon over which may run a driving chain l8 driven at suitable constant speed from any suitable means on the machine. Rotation-of the sprocket wheel I! rotates a gear :|9 formed integrally therewith which meshes with a driven gear 20 on an intermediate shaft 2|. Adjacent the driven gear 20 and also secured to the shaft 2| is anweccentric 22 so that rotationwof the driven gear '20 and intermediate shaft 2| will rotate the eccentric 22. Surroundingthe eccentric 22 is the larger 'endof a connecting rod 23 the opposite or upper end of which is attached to the central joint between a pair of toggle links 24 and 25. One end of one of these links .25 is attached in fixed position to an end frame of the machine or to "a bracket 9 secured thereto. The opposite end of the second link 24 is attached to a short lever 26 secured to one of the rocker shafts Hi. It will be seen from the above de-- scribed construction that rotation of the eccentric 22 with its shaft 2| will move the lower end of the connecting rod 23 in a circle and cause its upper end to move up and downto oscillate the links 24 .and 25 above and below their central plane. This will cause oscillatory movement of the short lever 26 and thus oscillating movement of the rocker shaft I0.

Each up and down-stroke of the connecting rod 23 :oscillates the shaft to the :right and left. The limiting position in one direction is when the links 24 and 25 are in the same plane and=in this limiting position the actuators l2 on shaft ID are in'position to operate the latch |5 whenever a drop wire I4 is down.

As there are spindles on opposite sides of the textile machines for which this invention is applicable the rocker shaft if] has secured to it a lever 21. The rocker shaft H on the'opposite side of the machine has a similar lever 28 and the two levers 21 and 28 are connected by a reach arm 29. With the'levers 21 and 28 and reach arm 29 connected as shown in Fig. 1 the'stop motion actuators I2 are oscillated simultaneously toward and from the latch detents on opposite sides-of the machine and are always brought to the same limiting position to actuate the detent and release the latch lever when :the. links 24 and 25 .are in their'central or mid position. The oscillatory movements of the rocker shafts Ill and II depend upon the eccentric 22 the eccentricity of which relative to shaft 2| is sufficient to give these shafts I0 and 2| sufficient amplitude of movement.

The shaft 2|, on which is mounted the eccentric 22 for actuating the links 24 and 25, is supported within an eccentric bearing 38 rotatably mounted in the bracket 9 secured to anend frame of the machine. Bearing member 30 is provided with an arm 3| by means of which it may be rotated to move the axis of shaft 2| as indicated in Fig. 5. In one position of the eccentric bearing 3|] the shaft 2| is held in a position to engage the teeth of gear 20 with those of the driving pinion Hi. In the other position of the eccentric member 30 the shaft 2| is held in a position which separates gears i9 and 20 and therefore stops rotation of eccentric 22 and operation of the shafts ID and H. To retain the bearing member 30 in either of its positions a locking: lever 32 is provided which in either position of the member 3|! engages a detent or lug .within a recess formed in the lever 32.

I claim as my invention: 1. A stop motion operating mechanism for textile machines comprising in combination, a rocker shaft, latch releasing actuators thereon, an armon said shaft, a pair of toggle links hinged together, one end of one of said links beingattached to said arm and the opposite end of the other link being pivoted to a fixed part of said machine, a connecting rod connected at one end to the central pivotal joint of said toggle links, and aneccentric engaging the opposite end of said connecting rod, whereby rotation of said eccentric will oscillate said links'and 'said rocker shaft.

2. A stop motion operating mechanism for teX-' tile machines comprisingin combination, a rocker shaft, latch releasing actuators thereon, an arm on said shaft, a pair of toggle links hinged together, one end of one of said links being attached to said arm and the opposite end of the otherlink being pivoted to a fixed part of said machine, a connecting rod connected at one end to the central pivotal joint of said toggle links, an eccentric engaging the opposite end of said connecting rod, whereby rotation of said eccentric will oscillate said links and said rocker shaft, and means to render said eccentric inoperative to oscillate said links and rocker shaft.

3. A stop motion operating mechanism for textile machines comprising in combination, a rocker shaft, stop motion actuators thereon, oscillating means for said rocker shaft including pivotally connected toggle links, oscillation of which oscillates said rocker shaft and actuators into and out of latch releasing position, an eccentric connected to the central joint of said links whereby rotation of said'eccentric oscillates said links and rocker shaft, and means to render said eccentric inoperative to oscillate said links and rocker shaft.

4. A stop motion operating mechanism for textile machines comprising in combination, a rocker shaft, latch releasing actuators thereon, an arm on said shaft, a pair of toggle links hinged together, one end of one of said links being attached to said arm and the opposite end of the other link being pivoted to a fixed part of said machine, a connecting rod connecting at one end to the central pivotal joint of said toggle links,-an eccentric engaging the opposite end of said connecting rod whereby rotation of said eccentric will oscillate said links and said rocker shaft, a shaft supporting said eccentric, and an eccentric bearing for said last mentioned shaft, whereby said shaft may be moved to operative and inoperative positions.

5. A stop motion operating mechanism for textile machines comprising in combination, a rocker shaft, latch releasing actuators thereon, an arm on'said-shaft, a pair of toggle links hinged together, one end of one of said links being attached to said arm and the opposite end of the 1 a shaft supporting said eccentric, an eccentric bearing for said last mentioned shaft, whereby said shaft may be moved to operative and inoperative positions, and a latch to retain said last named shaft in its operative and inoperative po- 5 sitions.

WILLIAM R. GORDON. 

